New perovskite solar cell retains 85% efficiency after operating for 1,000 hours at 185°F
The resulting cell produced a power conversion efficiency (PCE) of 25.56%.
Scientists have developed a new type of perovskite solar cell (PSC) that can withstand high-temperature encapsulation processes. The PSC demonstrates remarkable resilience even in high heat conditions with the help of an innovative protective film.
With the initial efficiency of 25.56%, the solar cell retained 85% of its efficiency despite operating for upto 1,000 hours under conditions of 185°F (85°C) and 85% relative humidity.
Developed by researchers from UNIST Graduate School of Carbon Neutrality, in collaboration with Gyeongsang National University (GNU), the PSC replaces the conventional additive 4-tert-butylpyridine (tBP) with ethylene carbonate (EC) in the composition of the PSCs.
High efficiency
Researchers also revealed that while tBP improves efficiency, it significantly lowers the glass transition temperature (Tg) of the hole transport layer to below 80°C, compromising the stability of the cell in high-temperature environments. Reports highlighted that the The glass transition represents the point at which the hole transport layer becomes nearly liquid.